Affiliation: | School of Electrical Engineering, Chungbuk National University, 410 SungBong-Ro, Heungduk-gu, Cheongju 361-763, Republic of Korea;Department of Computer Engineering, Kyungwon University, San 65, Sujung-gu, Sungnam 461-701, Republic of Korea;School of Integrated Technology, College of Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-gu, Seoul 120-749,Republic of Korea |